One thing to consider about the Kraken is that it might be a super intelligent animal. Cephalopods such as squid and octopus are very intelligent creatures. Octopus, in particular, are highly skilled problem solvers and escape artists. I watched in the news that talked about how an octopus escaped from its tank in an aquarium and slithered its way back into the sea. Another example involved an octopus being presented with a piece of fish that was sealed tight in a bottle. The octopus felt its way all the way around the bottle, analyzing every nook and cranny before finally removing the cork, reaching inside, and eating the fish. If you take those two examples of cephalopod intelligence and apply them to a Kraken, then you would have one terrifying sea monster indeed. That is what I am thinking about for my Kraken story idea.